Mixed standard solution diagram
|Mobile Phase||0.005mol/L tetrabutylammonium hydroxide solution: take 10.56ml|
of 25% tetrabutylammonium hydroxide solution, add 1800ml of
water. Then, mix well, adjust the pH value to 4.0 with 1mol/L
phosphoric acid, then dilute to 2000ml with water, mix well, and
filter with suction
0.005mol/L tetrabutylammonium hydroxide solution/ acetonitrile=
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